Definition: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to return the sum of all the numerical elements in the list A between the positions i and j (including positions i and j). Return 0 if no numerical element is present in the list between the given ranges. i and j will be non-negative, and will always have a value less than the length of A. i will always be less than j.
Input: 7, 8, ['U', 'b', 'Z', 'v', '2377', 'B', '6503', 'j', 'F', '7979', '3491', '8307', '3929', 'D', 's', '4859']

6503